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The XTC66 Casement Window System has also been developed to enhance the performance and energy efficiency of our window suites. It is an eco-friendly, sustainable, fully certified, patented aluminium window system. Measuring 66mm in depth. It can be glazed both internally or externally with 28 mm through to 48 mm units with a range of sash styles. The XTC66 is fully compatible and interchangeable with the TS66 & XT66 window systems.

The system has been tested to BS 6375 - 1 and security tested to PAS 24. It has excelled in all testing categories. The XT66 has unique patented technology which offers U-Values as low as 1.12 W/ m²K. 

This system has also been developed with conservation projects in mind, with slim frames and sash options designed to replicate historic steel window designs with a modern system performance.


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  • The system has been tested to BS 6375 - 1
  • Security tested to PAS 24
  • Excels the industry standards in weather performance in all tests.
  • Excellent thermal properties
  • Can achieve U-values in the region of 1.12 W/ m²K 
  • 66 mm in depth
  • Suitable for heritage conservation applications
  • Various sash styles
  • Opening options include: Top hung, side hung or parallel
  • Standard RAL colours available
  • Offers the CENsolutions Gold Standard Certification
  • 'Qualicoat' certified paint - Qualicoat Certificate
  • Powder Coating available - Valspar, Axalta, InterponTiger & IGP
  • Anodic finishes available
  • Project specific guarantees on request
  • Secured by Design security certified
  • 'Decoral' finishes - Please refer to AMS Technical Department as to the suitability of finish for exterior application. Colours may vary per batch and vary to the colours shown in the colour wheel below






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  • Tested to BS 6375 – 1: 2015 + A1 2016
  • Air tightness = Class 4
  • Water tightness = Class E1050 (1050 Pa)
  • Wind resistance = 2400 (Class E2400A)


  • Security tested to PAS 24: 2016




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  • XTC66 Window System Brochure Click HERE
  • BIM Store Models Click HERE
  • SpecifiedBy Click HERE
  • AMS Member Area Click HERE
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At AMS we are always committed to producing systems that are sustainable, high performing with long design life therefore minimising impact on the environment.

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